Table 1.

Occurrence of respiratory virus infections diagnosed with multiplex polymerase chain reaction method in neonatal intensive care units

Study	Symptoms	Infants studied Duration of the study	Viruspositive/examined	Viruses
van Piggelen et al. 6 2010, Netherlands	Signs of respiratory tract infection	All infants Five years	22/62 (41%)	Rhinovirus (n = 11), RSV (n = 8), others (n = 3)
Steiner et al. 9 2012, Austria	Signs of respiratory tract infection	Preterm infants 11 months	16/106 (15%)	Rhinovirus (n = 15), metapneumovirus (n = 1)
Bennett et al. 4 2012, USA	All infants in the NICU twice a week	<33 gestational age preterm infants One year	26/50 (52%) 30% asymptomatic	Parainfluenza viruses (n = 20), RSV (n = 15), metapneumovirus (n = 9), others (n = 11)
Smit et al. 10 2013, Netherlands	All infants in the NICU at admission	All infants One year	34/334 (10%)	Parainfluenza viruses (n = 15), rhinovirus (n = 7), RSV (n = 6), others (n = 6)
Kidszun et al. 11 2014, Germany	All infants with suspected nosocomial sepsis	All infants One year six months	6/60 (10%)	Picornavirus (n = 5), RSV (n = 1)
Kujari et al. 12 2014, Finland	Signs of respiratory tract infection	All infants Two years six months	14/76 (18%)	Rhinovirus (n = 7), parainfluenza viruses (n = 6), RSV (n = 2), coronavirus (n = 1)
Ronchi et al. 13 2014, USA	All infants with suspected nosocomial sepsis	All infants One year	8/100 (8%)	Entero‐/rhinoviruses (n = 2), rhinovirus (n = 2) coronavirus (n = 2), parainfluenza viruses (n = 2)

NICU = Neonatal intensive care unit; RSV = Respiratory syncytial virus.